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    Jack is a 13-year-old boy.

    One day, his father asks him, "How many letters are there in the alphabet(字母表)?"

    "24." He says.

    "24?" His father asks loudly, "Are you sure?"

    "Sorry, I don't know." Answers the son.

    "You don't know? You are in school for 7 years and you don't know how many letters there are in the alphabet?" The father is very angry(生气的).

    His son says, "No. But let me ask you a question, dad. You often go to the post office(邮局). Please tell me how many letters there are in the post office."

结合语境解释下面句子中的划线词语有误的是（   ）

阅读以下材料回答：

材料一：2014年6月12日~7月23日，第20届世界杯在巴西举行。其中6月12日太阳直射在23°N，7月23日直射在22°N附近。

材料二：左图为巴西世界杯场馆分布示意图，右图为马瑙斯和阿雷格里港月平均气温变化图。